The Yoshi Bike is an unlockable bike. Kart parts are unlocked at random by collecting Coins.
How do you unlock the sports bike in Mario Kart 8?
In Mario Kart 8 Deluxe, however, it must now be unlocked by collecting 1,350 coins, and its stats have been altered, with the bike now sharing its stats with only the Jet Bike and the Prancer.
How many coins do you need to unlock Mario Kart 8?
For every 50 coins you get, you’ll unlock a new piece. But once you hit 550 coins, unlocks happen every 100 coins. As you can imagine, this takes a lot of time.